Mr. Rosensteinwrote a memo used by the White House to justify Comey's firing, prompting him to reportedly threaten to resign since the memo, though critical of the former director's performance, did not recommend his termination. Trump wrote on Twitter, apparently referring to his Deputy Attorney General Rod Rosenstein. "He made a recommendation, but regardless of the recommendation, I was going to fire Comey", the President said during an interview with NBC's Lester Holt.

The website reported that Trump will sometimes interrupt conversations with associates to say, "I'm not under investigation".

President Donald Trump has created jobs as he promised during his campaign, but it's been through the "attorney full employment act", mocked Rep. Denny Heck, D-Wash., The Hill reported Friday.

Trump took to Twitter, his favourite tool of communication, to lament the "witch hunt" against him and accuse Hillary Clinton of destroying evidence tying her to Russian Federation.

The move to investigate the US President comes after Mr Trump fired Federal Bureau of Investigation director James Comey on May 9, according to the The Post.

Trump returned to the White House on Sunday after spending Father's Day weekend at the Camp David presidential retreat. A spokesman for Kasowitz did not immediately respond to a request for clarification.

In another tweet earlier on Friday, Mr Trump had said: "After 7 months of investigations & committee hearings about my 'collusion with the Russians, ' nobody has been able to show any proof".

Trump's comments came as lawyers for his presidential transition ordered former staffers to preserve all physical and electronic documents in order to comply with ongoing Russian Federation investigations. Grassley said Comey's dismissal and Comey's testimony on Lynch should be looked at together, noting that Comey "took the opportunity in his testimony to clear his own name by denouncing as false the administration's claims that the FBI rank-and-file had lost confidence in Mr. Comey's leadership in the wake of the Clinton email investigation". Comey testified that Trump directed him in February to drop an FBI investigation into former national security adviser Michael Flynn relating to the Russian Federation matter.

Coats and Rogers have testified that they were not pressured by the Trump administration.

President Donald Trump's closest allies are attacking the integrity of those involved in the widening probe of Russian interference in the US election, accusing special counsel Mueller of driving a biased investigation.